LONGVIEW, Texas — Retail gasoline prices across Texas and nationwide have increased an average 4 cents per gallon this week.

AAA Texas on Thursday reported the typical price at the pump statewide was $2.11 per gallon. Gasoline prices across the U.S. have reached $2.27 per gallon.

The association survey found Dallas with the most expensive gasoline in Texas at $2.15 per gallon. Beaumont and San Antonio have the state's cheapest gasoline this week at $2.07 per gallon.

AAA experts say gasoline prices have been on the rise due to more expensive crude oil costs and the start of refinery maintenance season. Gas prices typically increase this time of year as refineries do maintenance, which can limit fuel production.